22512222450 has 72 divisors (see below), whose sum is σ = 60635668548. Its totient is φ = 5988090240.

The previous prime is 22512222437. The next prime is 22512222493. The reversal of 22512222450 is 5422221522.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 4213437921 + 18298784529 = 64911^2 + 135273^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 115644 + ... + 241656.

Almost surely, 2^22512222450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22512222450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30317834274).

22512222450 is an abundant number, since it is smaller than the sum of its proper divisors (38123446098).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22512222450 is a wasteful number, since it uses less digits than its factorization.

22512222450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126428 (or 126420 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

Adding to 22512222450 its reverse (5422221522), we get a palindrome (27934443972).

The spelling of 22512222450 in words is "twenty-two billion, five hundred twelve million, two hundred twenty-two thousand, four hundred fifty".